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Utils: Rewrite fmt::split

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This commit is contained in:
Eladash 2021-01-05 17:34:35 +02:00 • committed by Ivan
parent 36159c2bd4
commit bf6f43ec3a
4 changed files with 27 additions and 18 deletions
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39
Utilities/StrFmt.cpp
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@ -418,32 +418,41 @@ std::string fmt::replace_all(const std::string& src, const std::string& from, co
return target;
}
std::vector<std::string> fmt::split(const std::string& source, std::initializer_list<std::string> separators, bool is_skip_empty)
std::vector<std::string> fmt::split(std::string_view source, std::initializer_list<std::string_view> separators, bool is_skip_empty)
{
std::vector<std::string> result;
usz cursor_begin = 0;
for (usz cursor_end = 0; cursor_end < source.length(); ++cursor_end)
for (usz index = 0; index < source.size();)
{
usz pos = -1;
usz sep_size = 0;
for (auto& separator : separators)
{
if (strncmp(source.c_str() + cursor_end, separator.c_str(), separator.length()) == 0)
if (usz pos0 = source.find(separator, index); pos0 != umax)
{
std::string candidate = source.substr(cursor_begin, cursor_end - cursor_begin);
if (!is_skip_empty || !candidate.empty())
result.push_back(candidate);
cursor_begin = cursor_end + separator.length();
cursor_end = cursor_begin - 1;
pos = pos0;
sep_size = separator.size();
break;
}
}
}
if (cursor_begin != source.length())
{
result.push_back(source.substr(cursor_begin));
if (!sep_size)
{
result.emplace_back(&source[index], source.size() - index);
return result;
}
std::string_view piece = {&source[index], pos - index};
index = pos + sep_size;
if (piece.empty() && is_skip_empty)
{
continue;
}
result.emplace_back(std::string(piece));
}
return result;